Machine for crushing ores or other uses.



No. 782,264. PATENTED FEB. 14, 1905. D. J. NEVILL.

MACHINE FOR GRUSHING ORES OR OTHER USES.

APPLIOATION FILED FEB. 13. 1902.

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MACHINE FOR GRUSHING ORES OR OTHER USES.

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WITNESSES PATENTED FEB. 14. 1905.

D. J. NBVILL.

MACHINE FOR ORUSHING ORES OR OTHER USES.

APPLICATION FILED IEB. 13. 1902.

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UNiTED STATES Patented February 14, 1905.

ATENT Farce.

DAVID JACK UEVILL, OF SALT LAKE CITY, UTAH.

SPECIFICATION forming part of Letters Patent No. 782,264, dated February 14, 1905.

Application filed February 13, 1902 Serial No. 93,839.

To 107/ Who/2t it win/y concern:

Be it known that I, DAVID JACK NnvILL, a citizen of the United States, and a resident of Salt Lake City, in the State of Utah, have invented certain new and useful Improvements in Machines for Crushing Ores or other Uses, of which the following is a description accompanied by drawings.

In the crushing of ores by means of rolls it is necessary, in order to avoid the stopping or breaking of the machine, to have one of the rolls yieldingly mounted to permit the passage of foreign substances-such as broken mining-tools, bolts, nuts, and the like*that get in with the ore and masses of congested material that occur in case of over feeding.

One object of my invention is to provide an elastic stop to receive the shock of the return of said roll after it has yielded for the passage of said substances.

Another object is to provide ready and durable means for relatively adjusting the rolls endwise of their axes.

A third object is to insure proper guidance of the material between the faces of the rolls; and a further object is to provide simple means whereby these various adjustments can be effected without stopping the machine.

The invention will be best understood by an immediatedescription of its preferred embod iment illustrated in the accompanying drawings.

Figure l isa plan view of my machine. 2 is a side elevation, partly in section. is a front elevation of the same. Fig. & is a transverse section of the hopper. Fig. 5 is a rear elevation of the axial adjusting device, and Fig. 6 is a perspective view of the hood and hopper. Fig. 7 is a fragmentary plan view, partly in section, through the line I I, Fig. 8. Fig. 8 is a vertical section through the line 8 S, Fig. 7.

Mounted in stationary bearings upon the frame or housing 7/ is a roll 0, carrying upon one end of its shaft (,1 a drive-pulley J, and upon the other end an axial adjusting device is provided to compensate or prevent the tendency of the grinding-surface of the rolls to become grooved or channeled. This is accomplished by moving the roll 0, with its shaft (7,

Fig. Fig. I)

a short distance along its axial line whenever grooving commences, and thereby insuring uniform wear to the rolls. Upon the end of the shaft (1 are a series of annular rings 4', fitting corresponding grooves in the tlu'ust-block f. Cast upon the sides of the thrust-block are trunnionsf", journaled in a yoke-lever which is pivoted to the frame I). To the upward extension of one arm of the yolw-lever is attached a screw eyebolt passing through a lug on the frame of the machine and adjustably locked by the nuts, as shown. 13y this single bolt the shaft may be adjusted longitudinally in its bearings, thus shifting the roll along its axis. In order that no horizontal pressure from the roll-shaft shall come on the lever some freedom of play lengthwise of the trunnionsisprovided,asshown. 'llhcyielding roll ',carryingon its shaft the d riving-pul leyfi, is mounted in l.)carings in a rigid yoke m which is fitted to slide and be guided upon the frame in a horizontal direction at right angles to the axis of the rolls. Sets of springs 11 are provided between pressure-plates p in such a way as to allow the roll and its yoke 12/ to yield under an excessive resistance between the rolls and to take up the rebound of the roll by allowing the yoke m to also yield in the opposite dircction that is to say, toward the roll r. This is accomplished in the following manner: 'lhespringso press the plates 1 p, respectively, against the yoke m in one direction and against the cross-head I] in the opposite direction; but bolts restrain the plates 1) from moving toward the roll. A second set of bolts s, provided with adjustingnuts and jam-nuts, bolt the plates 1 to the movable yoke in, so that the plates p will move with the yoke m if the yoke is carried by the rebound beyond the normal position for which it is set. The cross-head 1 is adjustably held to the frame of the machine by the screw 2 and the capstan-nuts a. By merely turning the nuts H u the entire yielding system, including the plates 7) p, springs 0, bolts x and r, and yoke m, may be adjusted toward the opposing roll c to compensate for wear between the rolls, and such :uljustment, it will be scenaloes not vary the yielding pressure produced by the springs o. The operafrom the roll 0, it will not yield until the pressure between the rolls is greater than the force exercised by the entire set of springs 0; but when the pressure does exceed the force of the compression-springs then the yoke m is forced back, with the plates 1), compressing the springs 0. As soon as the excessive pressure is relieved the springs 0 force the roll j back to its normal position, and the rebound or momentum of the parts may cause the roll and its yoke m to return beyond its normal position, in which case the bolts .9 will withdraw the plates 3), with the yoke m, to the left of the normal position, Figs. 1 and 2, compressing the springs 0 and taking up the rebound or recoil without shock. To increase the normal spring-pressure between the plates p the springs may be further compressed to any desired amount. For example,to compress them one-half inch more without changing the normal position of the roll-axis the nuts upon the bolts 8 should be screwed up until the plates 1) have been drawn one-half inch to the left, shortening the springs 0to that extent. Then the capstan-nuts uu should be turned until the cross-head q is again drawn into close contact with the plates 9, and finally the nuts on the bolts r are screwed up until there is no freedom of play between the plates and the cross-head g. If the parts are adjusted in the succession mentioned,the yoke on will not have been moved; but it is of course possible to accomplish the same result by a different order of procedure, moving the yoke m first to the left and then back by means of the screw t to the normal position. It will of coursebe understood that whenever the plates 1) p are pressed toward each other either by the pressure of material or by the recoil they movefreely upon the bolts .8 or '1', as the case may be, for the bolts and 7' are solely tension members. Adjustment for wear on the crushing-faces of the rolls is made by advancing the cross-head Q by the screw 2. and nuts a a.

In fine crushing with heavy feeds, and especially with wet ore, the ore has a tendency to escape between the sides of the feed-hopper and the end faces of the rolls. To obviate this difliculty and at the same time to lessen the wear between the parts, the movable side plates 10 are provided within the feed-hopper and hood :0 and are pressed by stiff springs 3 toward the ends of the rolls 0 and j, as shown in Fig. 4. The tension of said springs is such as to allow the side plates to yield under excessive pressure. The action of the springs 1/ is limited by the restraining-bolts 2, the nuts of which should be turned up until the plates w touch lightly, but do not press against the rolls. This reduces wear and friction, and as the plates wear away the bolts 2 are loosened to compensate therefor.

From the foregoing it will be seen that the invention provides that all the adjustments that are necessary to compensate for the wear of the crushing-faces shall be made at one point while the machine is in motion and in such a manner that the most incompetent or inexperienced operator cannotpossibly get the shafts out of alinement; second, it provides that the movable roll and bearings after rebound shall be brought to rest against an elastic stop; third, it provides an end thrustbearing by means of which one roll-shaft and roll can be moved longitudinally in its bearings while the machine is in motion by the operation of a single screw; fourth, it provides adjustable and renewable side plates that can be conveniently adjusted while the machine is in motion and which are arranged to yield under excessive pressure and return to their place after passage of the obstruction.

Having now described the invention in the most approved form now known to me, I specify as the characteristic features, without enumerating manifest modifications that may be made, the following:

1. In a machine for crushing ores, &c., the combination with a pair of rolls and. a movable bearing at each end of one of said rolls, of a spring for each of said bearings, two pressure-plates which are independently movable and between which the spring is supported, and means for transmitting the movement of the bearings in one direction to one of the plates, and means for transmitting the movement of the bearing in the opposite direction to the other plate, and an adjustable rigid abutment for the plates farthest from the bearing, substantially as set forth.

2. In a machine for crushing ores, &c., the combination with a pair of rolls, and a movable bearing at each end of one of said rolls, of a spring for each of said bearings, two independently-movable pressure-plates between which the spring is supported, one of said plates normally abutting against the movable bearing, and adjustable tension members between the other plate and the bearing, substantially as set forth.

3. In a machine for crushing ores, &c., the combination with a pair of rolls and movable bearings for one of the rolls, of an adjustable cross-head, a pair of pressure-plates for each bearing one plate of each pair abutting against the cross-head and the other plates against the respective bearings, springs between'the plates of each pair, and adjustable tension members between the bearings and the respective pressure-plates abutting against the crosshead, substantially as set forth.

L. In a machine for crushing ores, &c., the combination with a pair of rolls and movable bearings for one of the rolls, of an adjustable cross-head, a pair of pressure-plates for each bearing one plate of each pair abutting against the cross-head and the other plates against the respective bearings, springs between the IIO plates of each pair, adjustable tension members between the bearings and the respective pressure-plates abutting against the crosshead, and means for adjusting the said tension members, substantially as set forth.

5. In a machine for crushing ores, &c., the combination with a pair of rolls and a movable bearing at each end of one of said rolls, of two independently-movable plates one of which normally abuts against the bearing, a rigid support against which the other plate abuts, springs between said plates, and means independent of the bearing for limiting the movement of the pressure-plate abutting the bearing in one direction while permitting it to move in the opposite direction, substantially as set forth.

6. In a machine for crushing ores, &c., the ccnnbination with a pair of crushing-rolls, and movable bearings for one ofsaid rolls, of a pair of pressure-plates for each bearing, springs between the plates of each pair and means independent of the bearing for limiting the movement of each plate in one direction while permitting it to move in the opposite direction. substantially as set forth.

T. In a machine for crushing ores, &c., the combination with a pair of crushing-rolls, and movable bearings for one ofsaid rolls, of a pair of pressure-plates for each bearing, springs between the plates of each pair, means for adjusting the plates of each pair relatively to each other to vary the tension of the springs,

and means independent of the bearing forlimiting the movement of each plate in onedirection while permitting it to move in the opposite direction, substantially as set forth.

s. ln a machine for crushing ores, &c., the combination with a pair of rolls, and a movable bearing at each end of one of said rolls, of two independently-movable plates, one of which normally abuts against the bearing, a rigid support against which the other plate abuts, springs between the plates, means independent of the bearing for limiting the movement of the pressure-plate abutting the bearing in one direction while permitting it to move in the opposite direction, and means independent of the first said means for limiting the movement of the other plate away from the bearing while permitting it to follow and partake of the movement of the bearing toward its opposing roll, substantially as set forth.

9. In a machine for crushing ores, &c., the combination with a pairof crushing-rolls, and movable bearings for one of said rolls, of a pair of pressure-plates 'for each bearing, springs between the plates of each pair, means independent of the bearing for limiting themovcment of the pressure-plate abutting against the bearing in one direction while permitting it to move in the oppositedirection, and means independent of the first said means for limiting the movement of the other plate away from the bearing while permitting it to to]- low and partake of the movement of the bearing toward its opposing roll, substantially as set forth.

10. In a machine for crushing ores, &c., the combination with apair of crushing-rolls, and movable bearings at each end of one of said rolls, of a pair of pressure-plates for each hearing, springs between the plates of each pair, means for adjusting the plates of each pair relatively to each other to vary the tension of the springs, means imlepcndent of the bearing for limiting the movement of the pressureplate abutting against the bearing in one direction while pcrn'iitting itto move in the opposite direction, and means independent of the first said means for limiting the movementof the other plate away from the bearing while permitting it to :follow and partake of the movement of the bearing toward its opposing 1 roll, substantially as set forth.

Signed this 30th dayof December, 1901, at Salt Lake City.

DAVID JACK NEVILL.

\Vitnesses:

()LIvm: J. Eoilns'rox, ARTHUR lt. PARSONS. 

